JPS6015519B2 - stern drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a stern drive device that is installed at the rear of a ship and provides propulsion to the ship.

PRIOR ART AND PROBLEMS THEREOF Stern drives typically include a first part fixed to the hull and a second part coupled to the first part for rocking about a horizontally extending tilted axis. and a third portion coupled to the second portion for rotation about a viewing axis perpendicular to the forehead oblique axis.

This third part is a part that supports the propeller. Second
In order to be able to transmit power to the propeller regardless of the swing position of the part, a cross shaft is provided concentrically with the oblique axis of the forehead, and this cross shaft receives power from the engine.

In addition, in order to selectively transmit power between this cross shaft and the drive shaft connected to the propeller, an output gear is provided on the cross shaft, which meshes with a gear fixed to the drive shaft. The output gear and the output gear are switched by a clutch device between a state in which they rotate together and a state in which they freely rotate relative to each other. Such a clutch device includes one in which a dog clutch member is provided between two output gears provided on the cross shaft, which rotates together with the cross shaft but can be displaced in the axial direction (for example, as described in U.S. Pat. No. 3,556,040). However, the existence of the dog clutch member itself increases the overall structure of the device, and since the position of the dog clutch member is determined by itself, there is no room for change, and the arrangement of the means for shifting it is difficult. However, there are also restrictions on making the device more compact.In addition, if you want to avoid using such a dog clutch, the output gear should be fixed to the intersecting shaft, and the intersecting koji and the It is necessary to intermittent power between the input shaft and the input shaft (for example, as described in Japanese Patent Publication No. 49-16196), which complicates the mechanism and makes the entire device large in both examples. Regarding the steering movement, a coupling device is provided that connects the steering member rotatably provided in the first section and the third section, and this coupling device allows the second section to swing. It is designed to transmit motion for mimicking while doing so.

The steering coupling device is disposed laterally with respect to the device coupling the first portion and the second portion so as not to be displaced by the swinging of the second portion. Although this is known (e.g., as described in U.S. Pat. No. 3,339,517), the space inside the device for connecting the first part and the second part cannot be effectively utilized. The dimensions are large. SUMMARY OF THE INVENTION An object of the present invention is to provide a stern drive device that can solve the above-mentioned problems and has a compact configuration.
Means for Solving the Problems In the inventions set forth in claims 1 to 3, the output gear is configured to rotate together with the intersecting shaft and not move in the axial direction. supported by,
In addition, the cross shaft is made to be movable in the axial direction relative to the output gear, and the cross shaft is movable in the axial direction relative to the output gear. The power from the input shaft is switched on and off by displacing the fork shaft in all directions.

With this configuration, there is no need for a dog clutch member as in the conventional technology, and the transmission device can be made compact. Also, the degree of freedom in arranging the device for shifting the crossed cranes is increased, and the overall design of the device is improved. It also has the effect of making it possible to select the most desirable position for compactness. In the invention described in claims 4 and 5, there is provided a steering coupling device for coupling a third portion to a link device including a steering member rotatably supported by the first portion. is arranged laterally outwardly of the device for joining the first part and the second part.

With this configuration, the space inside the steering coupling device can be used effectively, and, for example, it is possible to arrange a power transmission device on the device coupling the first and second parts. This makes it possible to make the entire device more compact. DESCRIPTION OF THE PREFERRED EMBODIMENTS Shown in the accompanying drawings is a marine propulsion device 11 in the form of a stern drive, which is adapted to be mounted to a hull 13 having a transom section 15 .

In particular, the marine propulsion system 11 also (see FIG. 3)
The stern drive has an engine 17 preferably resiliently mounted therein together with the stern drive, said stern drive having a first part 19 fixed to the hull 13 by the engine 17 or other suitable device. The first or fixed part 19 is preferably of unitary die-cast construction and extends through the closure 23 of the transom section 15 and includes a pair of fixed sections aft of said beam section (see FIG. 2). Preferably, it includes a trunnion 21 having laterally spaced trunnions 25, said trunnions having concentric cylindrical inner and outer surfaces 27 and 2.
9 and defines a horizontally extending transverse forehead line 31 fixed relative to the hull 13. In the illustrated structure, the fixed part 19 of the stern drive is not supported directly from the beam 15 but is supported from the engine 17 and extends through the closure 23 of the beam 15. A suitable rubber member 33 (see FIG. 3) extends between the fixed part 19 of the stern drive and the beam part 15 to prevent water from penetrating into the hull 13. Supported by the cylindrical outer surface 29 of the trunnion portion 25 is a die cast member 41 (see FIG. 2), which has a second portion or portion movable obliquely relative to the first portion or fixed portion 19. It constitutes a part of the tiltable movable portion 43.

Bolted or otherwise suitably secured to the bottom of the tiltable member 41 is a support plate 45 that supports a thrust bearing supporting the third or steerable portion 51; Portion 51 is the second or tiltable portion 4
3 and is steerable about an axis 44 that is positioned in a partially surrounding relationship with respect to the section 41 and extends perpendicularly to the tilt axis 31 . The steering movement of the third part 51 also includes the third part 51 capable of steering movement and the second part 51 capable of tilting movement.
This is facilitated by the bearing 53 between the part 43 of the
Directional movement of the third part 51 relative to the second part 43 is resisted by a second thrust bearing 55 located between an annular shoulder 57 of the member 41 and a shoulder 59 of the part 51. The steerable part 51 rotatably supports a propeller shaft 61 at its lower end, which propeller shaft supports a propeller 63 and is rotated by the steerable part 51 via a suitable gearing 65. supported bearings (
(not shown) and a bearing 69 supported by a capital member 41 capable of oblique movement, it is coupled to a drive shaft 67 supported so as to rotate in the same D relationship as the steering movement axis 44.

Supported from the steerable portion 51 by thrust bearings 71 and radial bearings 73 is an outer cover member 75 that generally surrounds the top of the steerable portion 51 and
It has a partially spherical lower housing portion 77 that closes substantially upward and forward.

Since this cover member 75 is coupled to the fixed portion 19 by one or more shock absorbers (not shown),
It is arranged so that it does not spread around the steering axis 44. The lower housing portion 77 includes a generally downwardly and rearwardly connected partially spherical upper housing portion 79 which is connected to the fixed portion 19 by bolts or other suitable means and thereby forms part of the fixed portion 19. Collaborate.

The O-ring 81 is housed within the upper housing portion 79 and engages the lower housing portion 77 to provide a seal against moisture intrusion from the interface between the fixed upper housing portion 79 and the tiltable lower housing portion 77. Housing 8 that is stopped
3.

The fixed part 19 of the tail drive is attached to the wall 8 located forwardly.
This wall surface preferably includes a trunnion portion 25.
It serves to constitute a generally sealed housing 83 capable of retaining therein a suitable amount of lubricant for use with the steering coupling and the transmission system described below.

Included within the tail drive is an obliquely movable portion 43
and the steerable part 5 with respect to the tiltable part 43 and the fixed part 19, independently of the tilting movement of the steerable part 51.
This is a device for steering movement of 1.

In this regard, the steerable portion 51 has two laterally spaced arms 91 (see FIG. 2) that extend upwardly and laterally apart beyond the oblique axis 31. trunnion portion 25. Furthermore, the stern drive includes a steering member 93 suitably adapted by the fixed part 19 for arcuate movement about an axis 95 perpendicular to the oblique axis 31 and in the same plane as the steering axis 44. Supported. The steering member 93 has its lower end aligned with the oblique axis 31.
trunnion portion 2 spaced downwardly and laterally beyond
5 has a yoke 97 having laterally spaced downwardly extending legs 99 projecting outwardly from the yoke 5 . A device is provided for coupling the leg 99 of the yoke 97 of the steering member 93 with the arm 91 of the steerable part 51, irrespective of any oblique movement of the steerable part 51 relative to the fixed part 19. , the steerable portion 51 performs a steering movement in response to the steering movement of the steering portion 43.

In the illustrated construction, such a device includes vertically extending slots 1 in each of the arms 91 of the steerable portion 51.
01L and pins I03 extending from the legs 99 of the yoke 97 to the slots 101, respectively. Optionally, the yoke leg 99 has a slot 101 and a pin 1
03 may extend from the arm portion 91 of the steerable portion 51. When the steering member 93 is in the forward motion position, the pin 103 is repositioned in a substantially concentric relationship with the oblique axis 31. The steering member 93 extends at its upper end from a fixed part 19 of the stern drive in the hull 13 in front of the transom section 15 and has an operating lever 105 fixed thereon (see FIG. 3). The lever may be suitably coupled to a hull-mounted steering system (not shown) of any construction.

The steering movement of the steering lever 105 therefore carries out a steering movement of the steering member 93, which in turn carries out a steering movement of the steerable part 51 of the stern drive. A transmission device 121 is disposed within a housing 83 constituted by upper and lower housing parts 79 and 77, which is connected to the engine 17.
The input shaft 123 (see FIG. 3), which is driven by and rotatably supported by the fixed part 19 of the stern drive, is selectively operable to couple to the drive shaft 67. Furthermore, the transmission gear 121 has a cross shaft 125 which, at both its outer ends, is connected to the web part 12 which is located laterally and outwardly of the trunnion part 25 of the fixed stern drive part 19.
Fixed part 1 from bearing 127 supported by 9
9 and is suitably supported for rotational and directional movement.

Furthermore, the transmission device also has an output bevel gear 126 which is connected to the split bearing portion 12 of the member 41 of the stern drive section 43 which is movable obliquely so as to rotate in the same D relationship with the cross shaft 125.
8 and meshes with a bevel gear 130 fixed to the upper end of the drive shaft 67. In addition, the mirror tilt movable portion 43
A device is provided to prevent axial movement of the output gear 126 relative to the output gear 126.

In this regard, such movement is prevented by the engagement of output gear 126 against bevel gear 130 and thrust bearing 132 supported by split bearing 128 . In addition, the intersecting shaft 125 is connected to the output bevel gear 126.
The output bevel gear 12 has an integral rotational motion coupled to the
A device is provided for the relative axial movement of the cross axis 125 with respect to 6.

In this way, in the illustrated structure, the output bevel gear 12
6 and the cross shaft 125 are coupled in the form of mutually engaging splines. The transmission device 121 also includes one or more drive members in the form of bevel gear members (described below) that selectively couple the drive members to the cross-shaft 125 to rotate the shafts of the cross-shaft 125. A drive member and a device on the intersecting shaft 125 for integrally performing rotational movement in response to directional movement.

Further, the cross shaft 125 is spaced apart from both ends thereof and inwardly from the trunnion portion 25.
A pair of clutch parts 131 that are spaced apart in the direction of the bag and that perform axial and rotational movement together with the clutch parts 131 are fixedly supported.

Each clutch portion 131 includes a conical clutch surface 133 and a non-cylindrical surface disposed radially inward with respect to the clutch surface and spaced apart from the clutch surface 133 in a marring direction. 135.

In the particularly illustrated construction, the transmission device 121 includes a pair of laterally spaced drive members in the form of bevel gear members 141 supported by radial bearings 143 from the cylindrical inner surface 27 of the trunnion portion 25; Bevel gear member 141 is rotatable concentrically with intersecting shaft 125 .

Each bevel gear member is also rotationally supported by a thrust bearing 145. Additionally, each bevel gear member 141 includes a bevel gear portion 147 that meshes with an integral bevel gear 149 supported on an adjacent end of input shaft 123 . In this way, the bevel gear member 14
1 rotate in opposite directions. Additionally, each bevel gear member 141 has a portion 151 including a device for forming an opening □153.
and the closure has a non-circular surface generally aligned with the tilt axis 31 and for receiving a non-circular surface 135 of an adjacent clutch section 131, and the closure has a non-circular surface for receiving a non-circular surface 135 of an adjacent clutch section 131. Transmits rotational force to the

In the illustrated structure, the non-circular surfaces 135, 153 of the clutch portion 131 and the bevel gear member 141 have engaging spline shapes. Supported on each bevel gear member 141 to rotate integrally therewith and to move axially relative thereto is each clutch element 161.
, each of which is connected to an adjacent clutch portion 131 on the cross-shaped ball 125.
The clutch has a conical clutch surface 163 adapted to be engaged by a conical surface 133 of the clutch to rotate the cross shaft 125 in response to such engagement.

In the specifically illustrated configuration, clutch element 161 is supported on bevel gear portion 141 by an engaging spline portion.

Clutch element 161 includes one or more helical springs 16
The cylinder is biased in the direction toward the adjacent clutch portion 131 by suitable means such as 5.

As a result, when the cross shaft 125 is displaced in the track direction, a pair of adjacent conical surfaces 133 and 163 are initially engaged to rotate the cross shaft from the bevel gear section 143. Continuous axial displacement action in the same direction of the cross shaft 125 displaces the engaged clutch element 161 axially outwardly relative to the associated bevel gear member 141 against the action of the helical spring 165. At the same time, the non-cylindrical surface 135 of the associated clutch portion 131 is introduced into the non-cylindrical entrance 153 of the associated bevel gear member 141, so that the rotational force is transmitted through the spline joint between the bevel gear portion 141 and the clutch portion 131. It can be communicated. Bevel gear part 141 and cross shaft 125
It can be seen that the clutch portion 131 is inserted into the entrance 153 of the bevel gear member 141 when both rotate together as a result of the engagement of the conical surfaces 133 and 163. In this manner, the engagement action of the conical clutch acts to initiate the integral rotation action of the intersecting shaft 125 with the associated bevel gear member 141;
The main power transmission from the bevel gear member 141 to the cross shaft 125 is through a spline connection between the bevel gear member 141 and the cross shaft 125. A first position in which the intersecting shaft 125 is engaged with one of the bevel gear members 141 for forward drive, a second upright or neutral position in which both bevel gear members 141 are released, and the other bevel gear member 141 A device is provided for axially displacing the vehicle and a third position in which the vehicle is engaged to provide reverse drive.

In this regard, the cross-shaft has a pair of axially spaced annular shoulders 171 forming an annular groove (see part 3) that receives the branch 175 of the displacement lever 177. The displacement lever 177 has a cross shaft 179 which extends through the front wall 85 of the fixed part of the stern drive and is thus supported for precise movement.

At its front end, the koji part 179 has a displacement arm 1 with respect to this mari part inside the hull 13 and in front of the stern part 15.
81 is fixed and said arm is connectable to a suitable inboard actuation mechanism (not shown). Therefore, the displacement lever 17
The rocking motion of 7 acts to axially displace the cross shaft 125 between the forward drive, neutral and reverse drive positions. As previously mentioned, lateral displacement of the cross shaft 125 initially causes the pair of conical clutch surfaces 133 and 163 to engage, followed by integral rotation of the cross shaft 125 and one of the associated bevel gear sections 141. During this period, the related clutch portion 131 is inserted into the entrance 153 of the related bevel gear member 141. Thereafter, power is transmitted from the intersecting shaft 125 to the drive shaft 67 by the output bevel gear 126 and the bevel gear 130 fixed to the top of the drive shaft 67.

In this way, a power transmission effect between the input shaft 123 and the drive shaft 67 for forward movement, neutral movement, and reverse movement is provided. Furthermore, it can be seen that while the obliquely movable portion 43 and the steering movable portion 51 are all in the tilting position with respect to the fixed portion 19, each gear is continuously meshed and engaged. The transmission device 121 disclosed herein has the advantage of being able to transmit relatively large rotational forces without excessive fatigue resulting from engagement in the forward and reverse drive positions of the transmission device.

Furthermore, the power transmission is continuous regardless of the ramping effect. The steering device of the present invention avoids the sliding engagement between the bin 103 and the slot 101 when the steering angle is oo, that is, when moving in a straight line, and avoids the sliding engagement between the two parts due to the rolling and oblique action when the steering angle is 45 degrees or less. Minimize sliding engagement.

Furthermore, the pin and slot steering connection allows tilting movement that is not restricted by the steering connection. In addition, obscene,
The steering and power transmission coupling portions are connected to the upper and lower housing portions 77.
and 79 within a housing 83 .

[Brief explanation of the drawing]

FIG. 1 is a partial side view of a stern drive device according to the invention mounted on a hull; FIG. 2 is an enlarged view of a portion of the stern drive device shown in FIG. 1; and FIG. 3 is a partial side view of the stern drive device shown in FIG. 1. FIG. 3 is a partially enlarged partially broken sectional view of the device. 11...Marine propulsion device, 13...Pair combination, 15...Stern beam section, 17...Engine, 19
...First part (fixed part), 25...
・Trunion part, 31... Inclined axis line, 43...
...Second part (portion that allows oblique movement), 44...
... Steering axis, 51 ... Third part (steering operation possible part), 61 ... Propeller shaft, 63 ... Propeller, 65 ... Gear device, 67 ．． ．． ．． ．． ．． ．． Drive shaft, 93...Steering member, 99...Leg, 101...Slot, 103...Pin, 105...
Steering lever, 121...Transmission device, 123...
...Input axis, 125...Cross axis, 126...
・Output bevel gear, 130...Bevel gear, 131...
Clutch portion, 133... Conical clutch surface, 135... Non-cylindrical surface, 141... Bevel gear member, 147
...Bevel gear part, 149...Bevel gear, 161
...Clutch element, 177...Displacement lever. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A first portion fixed to the hull and extending behind the stern beam of the hull; a second portion; a device for supporting said second part from said first part for movement relative to said part; and a third part; for integral tilting movement and about a steering axis perpendicular to the tilt axis; a device for supporting the third portion from the second portion so as to rotate the third portion with respect to the second portion; the third portion supporting the propeller shaft and the propeller shaft; A propeller supported by a shaft and normally located below the water surface, a drive shaft, and a gear device connecting the drive shaft and the propeller shaft, and further rotatably supported by the first portion. input shaft;
a transmission device; the transmission device being rotatable in concentric relation to the tilt axis and supported by a first portion for axial movement relative to the first portion; an output gear supported by the second part for rotation concentrically with the shaft and non-axially movable relative to the second part and in driving coupling relation to the drive shaft; and a device disposed on an intersecting axis, for causing the intersecting axis and an output gear to rotate together and allowing axial movement of the intersecting axis relative to the output gear; driven by the input shaft and relative to the intersecting axis; a drive member supported by a first portion in concentric relation; said drive member being on said drive member and an intersecting axis for integral rotational movement in response to unidirectional axial movement of said intersecting axis; a device selectively coupled to the cross shaft; on the first portion and operatively engaged with the cross shaft to selectively axially displace the cross shaft, thereby intersecting the drive member; A stern drive device having: a device for coupling rotational movement with a shaft; 2. The stern drive device according to claim 1, wherein the cross shaft has a clutch portion having a conical clutch surface and a non-cylindrical surface, and the drive member is fixed on the input shaft. a bevel gear member having a bevel gear portion that engages with a driven bevel gear, the bevel gear member having a non-cylindrical surface of the clutch portion of the cross shaft in response to axial movement of the cross shaft toward the bevel gear member; an aperture having a non-cylindrical surface adapted to drivably receive the drive member, the drive member further comprising a clutch element mounted on the bevel gear member for rotation therewith and for relative axial movement therewith; the clutch element responsive to movement of the cross shaft toward the bevel gear member and before the non-cylindrical surface of the clutch portion is received by the non-cylindrical surface of the bevel gear member. a conical clutch face adapted to engage and drive a clutch face such that axial movement of the cross shaft begins to engage the conical face and rotate the cross shaft with the bevel gear member; a stern drive which subsequently provides driveable engagement of said non-cylindrical surface. 3. A first portion fixed to the hull and extending rearward of the stern beam of the hull; and a second portion; supporting the second portion from the first portion and extending in the horizontal direction. a device for causing movement relative to said first part about a lateral tilting axis; supported by said second part for integral tilting movement and about a steering axis perpendicular to said tilting axis; a third portion adapted to rotate with respect to the second portion; and a device for bringing the third portion into contact with the second portion; a linkage device including a steering member rotatably supported by the first portion around one axis in the same plane as the axis; and a linkage device including a steering member rotatably supported by the first portion, and the third portion is operated in response to a steering movement of the steering member. the second portion for coupling the steering member and the third portion for directional movement;
and a device disposed laterally outwardly of the device for supporting a portion of the stern from a first portion. 4. A stern drive according to claim 3, wherein the steering member has two downwardly extending, laterally spaced legs, and the third portion has two upwardly extending, laterally spaced legs. laterally spaced arms, and the coupling device is arranged to be coaxial with the tilt axis when the third portion is positioned for straight forward motion and is arranged to be coaxial with the tilt axis of the steering member. laterally spaced legs and laterally spaced arms of the third portion are coupled to effect steering movement of the third portion in response to steering movement of the steering member; When the second portion and the third portion tilt relative to the first portion, play movement is allowed between the legs and arms in directions other than those for steering; Stern drive.